You must create .env file and specify bellow env variables:
# Required
EMAIL_AUTH_PASSWORD=
EMAIL_AUTH_USERNAME=
EMAIL_TRANSPORT=
EMAIL_FROM=
EMAIL_RECEIVERS=
ERRORS_RECEIVER=
ADS_FILE=
# Moment compatible time string
NOT_BEFORE_DATE_TIME=
# SOCKS proxy server url
SOCKS_PROXY_SERVER=
# Optional, comma separated URLs with preselected query options from the relevant site
NJUSKALO_URL=
PLAVI_URL=
INDEX_URL=yarn install
yarn start